21 U.S.C. § 25 : US Code - Section 25: Oleomargarine, butterine, or imitation butter or cheese transported into a State subject to its police powers

Search 21 U.S.C. § 25 : US Code - Section 25: Oleomargarine, butterine, or imitation butter or cheese transported into a State subject to its police powers

All articles known as oleomargarine, butterine, imitation,
process, renovated, or adulterated butter, or imitation cheese, or
any substance in the semblance of butter or cheese not the usual
product of the dairy and not made exclusively of pure and
unadulterated milk or cream, transported into any State or
Territory or the District of Columbia, and remaining therein for
use, consumption, sale, or storage therein, shall, upon the arrival
within the limits of such State or Territory or the District of
Columbia, be subject to the operation and effect of the laws of
such State or Territory or the District of Columbia, enacted in the
exercise of its police powers to the same extent and in the same
manner as though such articles or substances had been produced in
such State or Territory or the District of Columbia, and shall not
be exempt therefrom by reason of being introduced therein in
original packages or otherwise.